[Solved] The effects of primary aging typically become apparent after age ____. Barbiturates: A class of drugs that act as central nervous system depressants, historically used for anxiety, insomnia, and seizure disorders. Nervous System: The complex network of nerve cells and fibers that transmits nerve impulses between parts of the body, coordinating bodily functions and activities. Erotic Movie: A genre of film that focuses on sexual themes and content, typically intended to arouse the audience. Nonalcoholic Beverage: A drink that contains no alcohol, such as soda, water, or juice.